1)the Senate rejected the Treaty of Versailles based primarily on objections to the League of Nations. The U.S. would never ratify the treaty or join the League of Nations..
2)The immediate economic consequences of the terms of the Treaty of Versailles were a significant concern and added to Germany's humiliation. Under the terms of the treaty Germany had to pay huge sums in reparations. In 1921, this amount was set at £6.6 billion; a sum that Germany could not pay